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Fused biconical taper-based multi-core optical fiber coupler with high fiber core number and preparation method of fused biconical taper-based multi-core optical fiber coupler

A multi-core optical fiber and fused tapered technology, which is applied in the coupling of optical waveguides and other directions, can solve the problems of unmatched arrangement of fiber cores and increased insertion loss of couplers, etc., and achieves easy preparation, high precision, and good scalability Effect

Pending Publication Date: 2021-11-02
芯华创(武汉)光电科技有限公司
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Problems solved by technology

[0003] However, the circular sleeve or capillary mentioned in the existing fusion tapered method, when preparing a coupler with a multi-core optical fiber greater than two layers of core regions, the inner tube wall cannot well bind the outermost layer of the fiber bundle. This will cause the core to not match the core arrangement of the outermost layer of the multi-core fiber, which will increase the insertion loss of the coupler

Method used

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  • Fused biconical taper-based multi-core optical fiber coupler with high fiber core number and preparation method of fused biconical taper-based multi-core optical fiber coupler
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  • Fused biconical taper-based multi-core optical fiber coupler with high fiber core number and preparation method of fused biconical taper-based multi-core optical fiber coupler

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preparation example Construction

[0029] The preparation method of the multi-core optical fiber coupler provided by the invention comprises the following steps:

[0030] (1) After stripping off part of the coating layer on the surface of N single-mode optical fibers, N first intermediate pieces are obtained; the first intermediate piece is divided into two parts, one part is an optical fiber comprising only a core layer and a cladding layer, and the other part It is a complete optical fiber including core, cladding and coating. Preferably, the coating layer of N single-mode optical fibers is stripped, and then the first intermediate piece is obtained after dedusting with a dust-free paper dipped in alcohol; the first intermediate piece is divided into two parts, and the front part is composed of a core layer and a cladding Layered optical fiber, the length is 4 to 6 cm, the rear end part is a complete optical fiber including the core layer, cladding and coating layer, the length is 1.5 to 3 meters, and N is an...

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Abstract

The invention belongs to the technical field of optical fiber communication and sensing, and relates to a method for preparing a multi-core optical fiber coupler with a high fiber core number based on fused biconical taper. The method comprises the following steps of: inserting a plurality of single-mode optical fibers of which the front ends are coated with coatings and the rear ends still keep the coatings into an inner polygonal sleeve subjected to first-time biconical taper; and performing primary tapering on a single-mode optical fiber, performing secondary tapering on the same position to fix the single-mode optical fiber by an inner polygonal sleeve, performing third tapering on a tapering area of the secondary tapering to enable the diameter of a tapering waist part to be consistent with that of a multi-core optical fiber cladding, cutting the tapering waist part, and finally directly welding with the multi-core optical fiber to complete the preparation of the multi-core coupler. The method for manufacturing the multi-core optical fiber coupler based on the inner polygonal sleeve is good in expandability and suitable for manufacturing the multi-core optical fiber coupler with the high fiber core number. The invention also provides a corresponding multi-core optical fiber coupler.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication and sensing, and more specifically relates to a multi-core optical fiber coupler with a high number of cores based on a fused taper and a preparation method thereof. Background technique [0002] Multi-core optical fiber plays an important role in improving system capacity, such as realizing short-distance connections in data centers. Multi-core fiber needs to be compatible with existing communication systems, and it needs to achieve low-loss connection with standard single-mode fiber. Therefore, the preparation technology of multi-core fiber coupler is extremely important. At present, the preparation method of multi-core optical fiber coupler is mainly fusion tapered method (CN201811089100.0), (CN201811393656.9) (CN202010231292.5). [0003] However, the circular sleeve or capillary mentioned in the existing fusion tapered method, when preparing a coupler with a multi-core opt...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/255
CPCG02B6/2552
Inventor 杜灏泽吴昊赵灿
Owner 芯华创(武汉)光电科技有限公司
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